Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB December 22 2023 crenelated mica spacers and excellent

crenelated mica spacers and excellent flashing

new in box National Union 25Z5 tubes tested to spec on our Paul Hart-calibrated TV7/U

Etsy will indicate how many are available in this Dutch Auction

Sylvania-BRANDED 8BQ5 tube tested to spec on our Paul Hart-calibrated TV7/U

They tested 50/38

Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB December 22 2023 crenelated mica spacers and excellentThis perfectly matched pair of milspec GE 6C4 6C4WA triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Both tubes measured 72 where minimum (65%) is 55 and 100% 85. They have gray plates; top O getters and two additional support rods for increased ruggedness and microphony suppression. These tubes have acid etched codes and designations as well as silk screened 68 26 188 5 67 50